/Engine/Source/Runtime/CoreUObject/Public/Serialization/EditorBulkData.h
Note that depending on the internal storage formats, the payload might not actually be compressed, but that will be handled by theFCompressedBufferinterface. CallFCompressedBuffer::Decompress()to get access to the payload inFSharedBufferformat.
[TFuture](API\Runtime\Core\Async\TFuture)< [FCompressedBuffer](API\Runtime\Core\Compression\FCompressedBuffer) > GetCompressedPayload() const